Add SHA256 verification, API updates, locale alignment, logging impro…

[SuperKali]

…vements

Features:

• Add SHA256 checksum verification after download (before decompression)
• Support cancellation during decompression phase
• Reset storage selection when cancelling flash operation
• Improve log format with ANSI colors for hastebin upload

API & Data:

• Switch to armbian-images.json endpoint (from all-images.json)
• Use board_name from API instead of local board_names.json lookup
• Add file_url_sha field for SHA256 verification
• Remove deprecated board_names.json file
• Add new vendors: Allwinner, ARM, SpacemiT, TQ-Group
• Fix YouYeeToo prefix capitalization

Localization:

• Add verifyingSha translation key to all 15 locales
• Remove unused home.images key from all locales

Documentation:

• Update README to mention SHA256 verification